CN213412703U

CN213412703U - Device for improving inner cavity problem of thick-wall EF-PSP pipe fitting

Info

Publication number: CN213412703U
Application number: CN202022136009.9U
Authority: CN
Inventors: 陈厚忠
Original assignee: Wuhan Century Jinniu Pipe Fittings Technology Co ltd
Current assignee: Wuhan Century Jinniu Pipe Fittings Technology Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-06-11
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses an improve device of inside cavity problem of thick wall EF-PSP pipe fitting, including mould and temperature control module, temperature control module includes electric heating element, temperature controller and temperature sensor, electric heating element has many pairs, two electric heating element symmetries among each pair of electric heating element are installed on preceding template and back template, two electric heating element among each pair of electric heating element insert with preceding model cavity respectively and the contact is inserted to the back model cavity, and two electric heating element among each pair of electric heating element are close to the position department that forms EF-PSP pipe fitting thick wall on the product die cavity that corresponds respectively, temperature sensor has a plurality ofly, each temperature sensor installs on the back template, and each temperature sensor is close to the electric heating element of corresponding installation on the back template, each electric heating element and each temperature sensor are connected with the temperature controller electricity respectively. The device is through local accurate heating, and the mobility of plastics solves the cavity problem that produces when increasing the department that produces cavity injection moulding to improve product quality.

Description

Device for improving inner cavity problem of thick-wall EF-PSP pipe fitting

Technical Field

The utility model relates to a EF-PSP pipe fitting production facility technical field, concretely relates to improve device of the inside cavity problem of thick wall EF-PSP pipe fitting.

Background

In building water supply pipe system, along with economic development, city high-rise building is constantly pushed away, and high-rise, super high-rise building especially require increasingly high to water supply pipe network system's bearing capacity, for the bearing capacity who improves pipe-line system product, the product wall thickness can corresponding increase.

If the EF-PSP double-hot-melting steel-plastic composite pressure pipeline system independently developed and newly developed by the department of China, plastic pipes and metal pipes are integrated, the pressure bearing capacity is high, and cavities (the cavities in the products can be detected by the X-ray detector) exist in partial EF-PSP pipe fitting products due to wall thickness and the like.

The reason that the cavity produced lies in EF-PSP pipe fitting injection moulding production process, especially the pipe fitting of pipe fitting wall thickness inequality, local wall thickness is too thick, because the solidification is cooled off earlier on the pipe fitting surface, the inside melt of pipe fitting thick wall department is pulled outwards, leads to the inside local starved of product to produce the cavity, thereby the inside cavity of product can influence product intensity and produce the influence to bearing the ability that supplies water pressure.

Disclosure of Invention

In order to solve the problems existing in the prior art, the utility model provides an improve device of the inside cavity problem of thick wall EF-PSP pipe fitting, the device simple structure through local accurate heating, the mobility of plastics solves the cavity problem that produces when increasing the injection moulding of cavity department to improve product quality.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

a device for improving the problem of the inner cavity of a thick-wall EF-PSP pipe fitting comprises a die for processing the EF-PSP pipe fitting, wherein the die comprises a front die plate, a front die cavity insert, a rear die plate, a rear die cavity insert and square iron, the front die cavity insert is embedded in the center of the front die plate, a plurality of uniformly distributed front die cavities are arranged on the front die cavity insert, the rear die cavity insert is embedded in the center of the rear die plate, a plurality of uniformly distributed rear die cavities are arranged on the front die cavity insert, the number of the front die cavities is the same as that of the rear die cavities, each front die cavity and the corresponding rear die cavity form a product cavity matched with the shape of the EF-PSP pipe fitting, the device also comprises a temperature control module, the temperature control module comprises an electric heating element, a temperature controller and a temperature sensor, the number of the pairs of the electric heating elements is the same as that of the product cavities, two electric heating elements in each pair of the electric heating elements, two electric heating elements in each pair of electric heating elements are respectively contacted with the front mould cavity insert and the rear mould cavity insert, the two electric heating elements in each pair of electric heating elements are respectively close to the position where the thick wall of the EF-PSP pipe fitting is formed on the corresponding product cavity, a plurality of temperature sensors are arranged, the number of the temperature sensors is the same as that of the product cavities, each temperature sensor is arranged on the rear mould plate and is close to the corresponding electric heating element arranged on the rear mould plate, the temperature controller is arranged on the outer side wall of the front mould plate or the rear mould plate, each electric heating element is respectively and electrically connected with the temperature controller, and each temperature sensor is respectively and electrically connected with the temperature controller.

The electric heating element comprises an electric heating insert and a heating rod, the electric heating insert is square, the cross section of the heating rod is circular, a circular embedding hole is formed in the center of the electric heating insert, the heating rod is embedded into the embedding hole, a plurality of pairs of mounting grooves are symmetrically formed in the front template and the rear template, the number of the mounting grooves is the same as that of the electric heating element, each electric heating insert is fixed in a corresponding placing groove respectively, and each heating rod is connected with a temperature controller through a lead.

The outer surface of the rear template connected with the square iron is provided with circular grooves, the number of the grooves is the same as that of the temperature sensors, and the temperature sensors are respectively arranged in the corresponding grooves.

The back template is provided with a main wire groove on the inner surface connected with the back template cavity insert, an auxiliary wire groove is arranged between each heating rod and the main wire groove, a wire connected with the temperature controller penetrates through the corresponding auxiliary wire groove and the corresponding main wire groove, a wire groove pressing block is arranged on one side of the main wire groove close to the temperature controller, and the wire groove pressing block is installed on the back template.

Compared with the prior art, the beneficial effects and advantages of the utility model reside in that:

the device is on the basis of original production EF-PSP pipe fitting mould, through increasing temperature control module, carry out local accurate heating in the position department that forms the thick wall of EF-PSP pipe fitting in the product die cavity, when injection moulding, the mobility of the molten plastics of the position department that forms the thick wall of EF-PSP pipe fitting in the product die cavity can improve by a wide margin to when the molten plastics of the position department that forms the thick wall of EF-PSP pipe fitting in the messenger product die cavity is outwards dragged, can not lead to local starving and produce the cavity because of mobility inadequately, thereby avoid the inside cavity that produces of EF-PSP pipe fitting, improve the quality of EF-PSP pipe fitting.

Drawings

FIG. 1 is a schematic structural diagram of a device for improving the problem of the inner hollow of a thick-wall EF-PSP pipe fitting.

Fig. 2 is a partial enlarged view of I in fig. 1.

Figure 3 is a top view of the device (with the front panel and the fixed die plate removed) for improving the problem of voids inside thick-walled EF-PSP pipe.

FIG. 4 is a schematic structural view of an EF-PSP pipe.

The hot-pressing die comprises a front die plate 1, a front die cavity insert 2, a front die cavity 3, a rear die plate 4, a rear die cavity insert 5, a rear die cavity insert 6, a rear die cavity 7, square iron 8, a temperature sensor 9, an electric heating insert 10, a heating rod 11, a groove 12, a main line groove 13, an auxiliary line groove 14, a line groove pressing block 14, a temperature controller 15, a shifting fork 16, a sliding block 17, a core 18, a 19-EF-PSP pipe fitting, a thick wall 20 and a cavity 21.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The structure of the device for improving the problem of the inner hollow of the thick-wall EF-PSP pipe fitting provided by the embodiment is shown in fig. 1 and 3, and comprises a die and a temperature control module for processing the EF-PSP pipe fitting.

As shown in fig. 1 and 3, the mold comprises a front template 1, a front mold cavity insert 2, a rear template 4, a rear mold cavity insert 5 and square iron 7, wherein the front mold cavity insert 2 is embedded in the center of the front template 1, the front mold cavity insert 2 is provided with two uniformly distributed front mold cavities 3, the rear mold cavity insert 5 is embedded in the center of the rear template 4, the front mold cavity insert 5 is provided with two uniformly distributed rear mold cavities 6, and each front mold cavity 3 and the corresponding rear mold cavity 6 form a product cavity matched with the shape of the EF-PSP pipe 19. The front die cavity insert 2 and the rear die cavity insert 5 are both made of steel and have good heat-conducting property.

The temperature control module comprises two pairs of electric heating elements, two temperature controllers 15 and two temperature sensors 8. As shown in fig. 2, the electric heating element includes an electric heating insert 9 and a heating rod 10, the electric heating insert 9 is square strip-shaped, the cross section of the heating rod 10 is circular, a circular embedding hole is arranged in the center of the electric heating insert 9, and the heating rod 10 is embedded into the embedding hole. The electric heating insert 9 is made of copper and has good heat conductivity. Two pairs of mounting grooves are symmetrically arranged on the front template 1 and the rear template 4, and each electric heating insert 9 is respectively fixed in the corresponding placing groove. The two electric heating inserts 9 in each pair of electric heating elements are respectively contacted with the front die cavity insert 2 and the rear die cavity insert 5, and the two electric heating inserts 9 in each pair of electric heating elements are respectively close to the positions of the thick walls 20 of the EF-PSP pipe fittings 19 formed on the corresponding product die cavities. The heating rod 9 is circular, if the heating rod is directly contacted with the front model cavity insert and the rear model cavity insert, the heat transfer effect is poor due to small contact area, so that the square electric heating insert with good heat conduction performance is arranged, the contact area between the heating rod and the front model cavity insert and the contact area between the heating rod and the rear model cavity insert are increased, and the heat conduction efficiency is improved. The position of the thick wall of the EF-PSP pipe fitting formed on the product cavity is accurately heated, so that the fluidity of the molten plastic is improved, and the generation of cavities is avoided.

Two uniformly distributed grooves 11 are formed in the outer surface, connected with the square iron 7, of the rear template 4, and the grooves 11 are circular. The two temperature sensors 8 are respectively arranged in the two grooves 11, and the two temperature sensors 8 are respectively close to the two electric heating insert blocks 9 arranged on the rear template 4.

The temperature controller 15 is fixed on the outer side wall of the rear template 4, the two temperature sensors 8 are respectively connected with the temperature controller 15 through leads, and the four heating rods 10 are respectively connected with the temperature controller 15 through leads. The inner surface of the rear template 4 connected with the rear mould cavity insert 5 is provided with a main wire groove 12, and an auxiliary wire groove 13 is arranged between each heating rod 10 and the main wire groove 12. The lead wire connected with the temperature controller 15 of each heating rod 10 runs through the corresponding secondary wire groove 13 and the main wire groove 12, one side of the main wire groove 12 close to the temperature controller 15 is provided with a wire groove pressing block 14, and the wire groove pressing block 14 is installed on the rear template 4.

The structure of the EF-PSP pipe is shown in figure 4, a cavity 21 is easily generated in the thick wall 20 of the EF-PSP pipe in the injection molding process, in the production process of the EF-PSP pipe, the temperature of a heating rod 10 is adjusted through a temperature controller 15 and a temperature sensor 8 during the injection molding, the heat generated by the heating rod 10 is transferred with a front mold cavity insert 2 or a rear mold cavity insert 5 through an electric heating insert 9 and is accurately transferred to the position of the product cavity where the thick wall 20 of the EF-PSP pipe 19 is formed, the fluidity of molten plastic at the position of the thick wall 20 of the EF-PSP pipe 19 on the product cavity is improved, so that the generation of the cavity at the position of the thick wall of the EF-PSP pipe is reduced, the quality of the EF-PSP pipe is ensured, after the injection molding is finished, the EF-PSP pipe 19 is formed in the product cavity, the mold is opened, a slide block 17 is driven by a shifting fork, and ejecting the EF-PSP pipe fitting by using an ejecting roller of the injection molding machine.

Claims

1. The utility model provides an improve device of inside cavity problem of thick wall EF-PSP pipe fitting, including the mould that is used for processing EF-PSP pipe fitting, the mould includes preceding template, preceding die cavity insert, the back template, back die cavity insert and square iron, preceding die cavity insert inlay in preceding template central authorities, preceding die cavity insert and be equipped with the preceding die cavity of a plurality of equipartitions, back die cavity insert and inlay in back template central authorities, preceding die cavity insert and be equipped with the back die cavity of a plurality of equipartitions, preceding die cavity is the same with the number of back die cavity, each preceding die cavity constitutes the product die cavity with EF-PSP pipe fitting appearance assorted with the back die cavity that corresponds, its characterized in that: the temperature control device also comprises a temperature control module, the temperature control module comprises electric heating elements, a temperature controller and temperature sensors, the number of pairs of electric heating elements is the same as the number of product cavities, two electric heating elements in each pair of electric heating elements are symmetrically arranged on the front template and the rear template, the two electric heating elements in each pair of electric heating elements are respectively contacted with the front mold cavity insert and the rear mold cavity insert, the two electric heating elements in each pair of electric heating elements are respectively close to the position of the thick wall of the EF-PSP pipe formed on the corresponding product cavity, the number of the temperature sensors is the same as the number of the product cavities, each temperature sensor is arranged on the rear template and close to the corresponding electric heating element arranged on the rear template and is arranged on the outer side wall of the front template or the rear template of the temperature controller, and each electric heating element is respectively and electrically connected with the temperature controller, each temperature sensor is electrically connected with a temperature controller.

2. The device for improving the internal void problem of thick-walled EF-PSP pipe fittings of claim 1, wherein: the electric heating element comprises an electric heating insert and a heating rod, the electric heating insert is square, the cross section of the heating rod is circular, a circular embedding hole is formed in the center of the electric heating insert, the heating rod is embedded into the embedding hole, a plurality of pairs of mounting grooves are symmetrically formed in the front template and the rear template, the number of the mounting grooves is the same as that of the electric heating element, each electric heating insert is fixed in a corresponding placing groove respectively, and each heating rod is connected with a temperature controller through a lead.

3. The device for improving the internal void problem of thick-walled EF-PSP pipe fittings of claim 1, wherein: the outer surface of the rear template connected with the square iron is provided with circular grooves, the number of the grooves is the same as that of the temperature sensors, and the temperature sensors are respectively arranged in the corresponding grooves.

4. The device for improving the internal void problem of thick-walled EF-PSP pipe fittings of claim 1, wherein: the back template is provided with a main wire groove on the inner surface connected with the back template cavity insert, an auxiliary wire groove is arranged between each heating rod and the main wire groove, a wire connected with the temperature controller penetrates through the corresponding auxiliary wire groove and the corresponding main wire groove, a wire groove pressing block is arranged on one side of the main wire groove close to the temperature controller, and the wire groove pressing block is installed on the back template.